Answers

Solutions by everydaycalculation.com

Answers.everydaycalculation.com » Add fractions

Add 63/21 and 18/45

1st number: 3 0/21, 2nd number: 18/45

63/21 + 18/45 is 17/5.

Steps for adding fractions

  1. Find the least common denominator or LCM of the two denominators:
    LCM of 21 and 45 is 315

    Next, find the equivalent fraction of both fractional numbers with denominator 315
  2. For the 1st fraction, since 21 × 15 = 315,
    63/21 = 63 × 15/21 × 15 = 945/315
  3. Likewise, for the 2nd fraction, since 45 × 7 = 315,
    18/45 = 18 × 7/45 × 7 = 126/315
  4. Add the two like fractions:
    945/315 + 126/315 = 945 + 126/315 = 1071/315
  5. 1071/315 simplified gives 17/5
  6. So, 63/21 + 18/45 = 17/5
    In mixed form: 32/5

MathStep (Works offline)

Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad

Related:

© everydaycalculation.com